Here's a pic of my teams release thingy. We can change how high it is and it's clamped down on the end.I completely agree.
Rule 2b says something about the attachment point required to be at the top end of the elastic cord.
Rule 3a says you get time to prepare your device
Rule 3c says you cannot modify the cord after impound.
If you must attach to the top end and cannot modify the cord, exactly what is there to prepare?
The way I read the rules, if a team tried to use only part of their cord (an obvious solution) they would be guilty of either modifying the cord (by rolling it up) or not attaching to the top end.
Add the ambiguity of a release mechinism supplied by the event supervisor which must be used (3B) and the event appears impossible.
Hopefully I'm missing something.
Pretty sure it means that you can change the length of your device (where you put it so it drops a certain height) but you can't change what actually makes up your bungee, as as adding another string or something.
My partner and I have our entire length elastic, and are measuring the length for each height, and then changing the weight and doing the same. Our coach told us that it should be a linear change, but you also need to account for the bungee stretching the more you use it.
How much does everyone's bungee stretch from 1m? Partner said that we get 233% from the stuff we have. Testing gives us a fairly close number.